Half-Life 2 is a story driven first person shooter sequel created by Valve Software. The original Half-Life, Valve's debut title, won more than 50 game-of-the-year awards and sold more than eight million retail units sold worldwide. Quite simply it's one of the most popular and most enjoyable PC games of all time. Using the income Valve received from the original they have invested in developing the sequel, which far exceeds the original and again changed the face of first person shooting. By taking Half-Life's suspense, challenge and visceral charge, realism and responsiveness, Half-Life 2 opens the door to a world where the player's presence affects everything around him, from the physical environment to the behaviors even the emotions of people around him. The intense, real-time gameplay of Half-Life 2 is made possible only by Source, Valve's new proprietary engine technology. Source provides major enhancements in characters. physics, graphics and AI. Source's shader-based renderer, like the one used at Pixar to create movies such as Toy Story and Monster's, Inc., creates the most beautiful and realistic environments ever seen in a video game.